lym·pho·ma 
(lĭm-fōmə)
(lĭm-fōmə)n. pl. lym·pho·ma·ta (-mə-tə) or lym·pho·mas
1. Any of various malignant tumors that arise from the lymphocytic cells of the immune system.
2. Any of various cancers characterized by the development of such tumors, especially Hodgkin lymphoma and non-Hodgkin lymphoma.
lym·phoma·toid′, lym·phoma·tous (-təs) adj.